Frame structure of baby carriage



FIG. 1 is a front view of a frame structure of baby carriageshowing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is a rear view showing the folded state thereof. 

The ornamental design for a frame structure of baby carriage, as shown and described. 